Nice to see radiator and reflector for each band (10m, 15m, 20m) and the feeder-line. => To enlarge, please click the picture Right below the loop for the 17m-band. |
In 2004 a 20m high glass fibre tower was the basis for a 80m-band vertical. By using an automatic tuner and radials on the floor this wire-antenna was mounted and used - as well on other bands. A comparison with the Moxon-Beam on the 20m-band and a radio-station in Colombia only showed a 6dB poor signal strength. |
In 2005 we used our Aluminium tower to mount a 2-element-Beam for 40m for the first time (HyGain). To put up and take down a car was needed, therefore only 4 pairs of hands were helping. The antenna was turned by "Armstrong", by handmode - a Rotor had been to heavy for the tower. Unfortunally the insert of effort don't gave the result we wished. |
In 2007 the 2-element-vertical for the 40m-band was mounted to a total hight of 23m by two 12m long Spiderbeam glass fibre towers. |
... without break! |
In 2007 and 2008 we made some experiments with a dragon antenna. Unfortunally the dragon could not hold on position to test the antenna. Definitely the next years we will continue this theme. |
Both systems in combination of two antennas can be switched in vertical or horizontal way. These from Flexa-Yagi-components made antennas never could be sold. They were modificate by Gaby. |
In 2008 another new antenna for the 40m-band was used for the first time: A 4-Square. This antenna is a combination of 4 separate verticals, which will be activated phase shifted. Within a second the anenna-direction can be switched. The gain is the same as a 3-Element- Beam! In comparison to a triple-leg there is a different of more than 20dB! |
Each vertical needs a network of radials and has to be exactly tuned. The connector of the switching box are: - left: HF-power- und control-cable - above: HF-control-cable - right: antenna cables Many thanks to Franz, DF6QV, (5A7A-DX- pedition) who gave Gaby a lot of information to this excellent antenna! |
Some
more
antennas were used: -
120cm-shield-reflector for
23cm
- Yagi for 70cm - Groundplane for 2m/70cm - Groundplane for 6m - Yagi for 6m - FD4 - Double zeppelin - combinated dipol for 40m/80m |